Wrong. Vscode server is a binary blob, it only requires glibc. It doesn't need anything else, like shells. It even brings its own git.

Git project, magit and magit-wip mode which creates intermediate commits automatically. In general file editing, emacs file backups are pretty good; learn to work with them.

It's trivial, using the emacs-plus tap.

I think emacs should adopt vscode remote dev architecture: install a remote server and communicate with it using some rpc protocol. Maybe someone is working on it, I don't know.

This discussion should happen on the emacs dev mailing list, if you want to involve the core developers.